numbuzin glutathione vitamin concentrated serum No.5+ Serum, 1.01 fl oz 1) Keep out of reach of children Numbuzin No. 5 Vitamin Concentrated

You should avoid using copper peptides at the same time as the following ingredients: retinol vitamin C alpha hydroxy acids (AHAs), such as glycolic acid (if youre using an AHA-containing chemical peel, you may use copper peptides after your treatment) Copper peptides in beauty products generally dont pose major risks

10.1101/gad.343129.120 7 BourgeoisB.SpreitzerE.Platero-RochartD.PaarM.ZhouQ.UsluerS.et al (2025)

It must be emphasized that effects in humans on hair follicle health are not as dramatic

This reduces the availability of the drug in the bloodstream

Cheng T, Wu J, Wu Y, Chilukuri RV, Huang L, Yamamoto K

Discovery of the ergothioneine transporter